Example: A d.c. shunt generator gave the following open-circuit characteristic when driven at 750 r.p.m. Field current 0.5 1 1.5 2.5 (A) e.m.f. (V) 1- If the machine is run as a shunt generator at 750 r.p.m., to what voltage will it excite with shunt field resistance equal to 70Q? 50 84 105 120 131 2- What is the critical value of shunt field resistance? 3- What is the critical speed when the shunt field resistance is 702? 4- With shunt field resistance equal to 552. What reduction in speed be made to make the open-circuit voltage equal to 100V? 3

Example: A d.c. shunt generator gave the following open-circuit characteristic when driven at 750 r.p.m. Field current 0.5 1 1.5 2.5 (A) e.m.f. (V) 1- If the machine is run as a shunt generator at 750 r.p.m., to what voltage will it excite with shunt field resistance equal to 70Q? 50 84 105 120 131 2- What is the critical value of shunt field resistance? 3- What is the critical speed when the shunt field resistance is 702? 4- With shunt field resistance equal to 552. What reduction in speed be made to make the open-circuit voltage equal to 100V? 3

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

See similar textbooks

Similar questions

The armature winding resistance of a long shunt connected DC generator is 0.4ohm, the resistances of the shunt and serial field windings are 125 ohms and 0.1 ohms, respectively. While the generator supplies 8KW of power to the load it feeds, which is the voltage it produces since the output voltage is 250V?
I need the answer quickly
1
A 1000rpm DC shunt generator is supplying 100 lamps of 60W at 230V, the armature and field resistance are respectively 0.10 and 1150.Calculate the Load current. O a. 26.09 A O b. 16.09 A OC. 36.09 A O d. 46.09 A
A short-shunt generator supplies 220A at 260V. The armature resistance is 0.15Ω, shunt field resistance is 50Ω, and the series field resistance is 0.2Ω. If the SPL amounts to 4% of the total power output, determine the efficiency (in %).
State two reasons why a self-excited shunt dc generator may fail to build up a voltage. In each (both) case, briefly explain what can be done to correct the problem. Reason #1 Solution #1 Reason #2 Solution #2